<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }

        #box{
            width: 0px;
            height: 0px;

            border: 100px solid;

            border-top-color: transparent;
            border-right-color: transparent;
            border-left-color: transparent;
            border-bottom-color: burlywood;
        }        
    </style>
</head>
<body>
    <div id="box"></div>
</body>
<script>
    var a = "40"
    var b = 7
    console.info(a%b)
    console.info(a+b)
</script>
</html>